that pledge comes as the world watches japan struggle to control a damaged nuclear power plant. lucy craft has the latest from tokyo. >> reporter: executives of tokyo electric power-- or "tepco"-- did the customary bow of remorse, apologizing for a disaster that shows no signs of abating. their president, conspicuously absent from public view for several weeks, has checked into the hospital, complaining of high blood pressure. the latest alarming news from tepco? radioactive iodine in seawater near the fukushima plant has surged to 3,355 times legal limits. officials continue to argue seawater contamination won't ruin japanese fisheries, but these assurances are cold comfort to the agriculture and marine industries, which have lost consumer confidence here and abroad. meanwhile, tepco dropped another bombshell today. businesses are being asked to slash their energy use by a whopping 25%, or tokyo could face a long, hot summer of blackouts. lucy craft, "nightly business report," tokyo. >> tom: as we reported earlier, part of president obama's latest energy plan is focused on expa